Use knowledge of positive and negative numbers to calculate intervals

Maths

In this unit pupils will  interpret numbers greater than and less than zero. They will read and write negative numbers explain, how the value of a number relates to its position from zero positioning on a number line. In the future unit pupils will estimate the value and position of numbers including negative numbers on unmarked or partially marked number lines and calculate intervals across zero.

In the prior unit pupils compared and ordered 4-digit numbers They learned to round and rounded 4-digit numbers to the nearest 1000, 100 and 10, counted backwards through 0. In this unit pupils will interpret numbers greater than and less than zero. They will read and write negative numbers, explain how the value of a number relates to its position from zero, positioning on a number line.

Negative numbers

The temperature was 5℃ in the day. Then it dropped to −4℃ at night. What was the change in temperature? {{  }}℃

Izzy was on the −3rd floor of a hotel. She took the lift to the 4th floor. How many floors did she go up?

A lift in a hotel goes up six floors from the floor marked −2. What floor is it now on?

The temperature is −7℃. Calculate the new temperature if it drops by 6℃. {{  }}℃

There is a temperature increase of 5℃ from −11℃. What is the new temperature? {{  }}℃

A submarine is below the surface of the water at −20 m. It goes up 5 m, then down 25 m. Where is it now?   

Tick all of the options that show 17 partitioned into two parts.

Order these temperatures from warmest to coldest. 

The temperature was −7℃. One hour later it was −5℃. It got colder.

These temperatures are getting warmer as they go along: −7℃, −6℃, −4℃, −2℃

Put the following numbers into descending order. 

Tick all the temperatures that would appear in between −30℃ and −20℃ on a number line.

This lesson will soon be taken down.

Use knowledge of positive and negative numbers to calculate intervals

Lesson outcome